ERC-20
DeFi
Overview
Max Total Supply
139,449.1825346175761536 DCHF
Holders
1,711 ( -0.058%)
Market
Price
$1.06 @ 0.000397 ETH (-0.05%)
Onchain Market Cap
$148,095.03
Circulating Supply Market Cap
$0.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.838826670885959894 DCHFValue
$0.89 ( ~0.000332847000333071 Eth) [0.0006%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
DCHFToken
Compiler Version
v0.8.14+commit.80d49f37
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.14; import "@openzeppelin/contracts/utils/math/SafeMath.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "./Dependencies/CheckContract.sol"; import "./Interfaces/IDCHFToken.sol"; /* * DCHFToken contract valid for both V1 and V2: * * It allows to have 2 or more TroveManagers registered that can mint and burn. * It allows to have 2 or more BorrowerOperations registered that can mint and burn. * * Two public arrays record the TroveManager and BorrowerOps addresses registered. * * Two events are logged when modifying the array of troveManagers and borrowerOps. * * The different modifiers are updated and check if either one of the TroveManagers * or BorrowerOperations are making the call with mapping(address => bool). * * functions addTroveManager and addBorrowerOps register new contracts into the array. * * functions removeTroveManager and removeBorrowerOps enable the removal of a contract * from both the mapping and the public array. * * Additional checks in place in order to ensure that the addresses added are real * TroveManager or BorrowerOps contracts. */ interface ITroveManager { function isContractTroveManager() external pure returns (bool); } interface IBorrowerOps { function isContractBorrowerOps() external pure returns (bool); } contract DCHFToken is CheckContract, IDCHFToken, Ownable { using SafeMath for uint256; address[] public troveManagers; address[] public borrowerOps; IStabilityPoolManager public immutable stabilityPoolManager; mapping(address => bool) public emergencyStopMintingCollateral; mapping(address => bool) public validTroveManagers; mapping(address => bool) public validBorrowerOps; event EmergencyStopMintingCollateral(address _asset, bool state); event UpdateTroveManagers(address[] troveManagers); event UpdateBorrowerOps(address[] borrowerOps); constructor(address _stabilityPoolManagerAddress) ERC20("Defi Franc", "DCHF") { checkContract(_stabilityPoolManagerAddress); stabilityPoolManager = IStabilityPoolManager(_stabilityPoolManagerAddress); emit StabilityPoolAddressChanged(_stabilityPoolManagerAddress); } // --- Functions for intra-Dfranc calls --- function emergencyStopMinting(address _asset, bool status) external override onlyOwner { emergencyStopMintingCollateral[_asset] = status; emit EmergencyStopMintingCollateral(_asset, status); } function mint( address _asset, address _account, uint256 _amount ) external override { _requireCallerIsBorrowerOperations(); require(!emergencyStopMintingCollateral[_asset], "Mint is blocked on this collateral"); _mint(_account, _amount); } function burn(address _account, uint256 _amount) external override { _requireCallerIsBOorTroveMorSP(); _burn(_account, _amount); } function sendToPool( address _sender, address _poolAddress, uint256 _amount ) external override { _requireCallerIsStabilityPool(); _transfer(_sender, _poolAddress, _amount); } function returnFromPool( address _poolAddress, address _receiver, uint256 _amount ) external override { _requireCallerIsTroveMorSP(); _transfer(_poolAddress, _receiver, _amount); } // --- External functions --- function transfer(address recipient, uint256 amount) public override returns (bool) { _requireValidRecipient(recipient); return super.transfer(recipient, amount); } function transferFrom( address sender, address recipient, uint256 amount ) public override returns (bool) { _requireValidRecipient(recipient); return super.transferFrom(sender, recipient, amount); } function addTroveManager(address _troveManager) external override onlyOwner { CheckContract(_troveManager); assert(ITroveManager(_troveManager).isContractTroveManager()); require(!validTroveManagers[_troveManager], "TroveManager already exists"); validTroveManagers[_troveManager] = true; troveManagers.push(_troveManager); emit UpdateTroveManagers(troveManagers); } function removeTroveManager(address _troveManager) external override onlyOwner { require(validTroveManagers[_troveManager], "TroveManager does not exist"); delete validTroveManagers[_troveManager]; _removeElement(troveManagers, _troveManager); emit UpdateTroveManagers(troveManagers); } function addBorrowerOps(address _borrowerOps) external override onlyOwner { CheckContract(_borrowerOps); assert(IBorrowerOps(_borrowerOps).isContractBorrowerOps()); require(!validBorrowerOps[_borrowerOps], "BorrowerOps already exists"); validBorrowerOps[_borrowerOps] = true; borrowerOps.push(_borrowerOps); emit UpdateBorrowerOps(borrowerOps); } function removeBorrowerOps(address _borrowerOps) external override onlyOwner { require(validBorrowerOps[_borrowerOps], "BorrowerOps does not exist"); delete validBorrowerOps[_borrowerOps]; _removeElement(borrowerOps, _borrowerOps); emit UpdateBorrowerOps(borrowerOps); } // --- Internal functions --- function _removeElement(address[] storage _array, address _contract) internal { for (uint256 i; i < _array.length; i++) { if (_array[i] == _contract) { _array[i] = _array[_array.length - 1]; _array.pop(); break; } } } // --- 'require' functions --- function _requireValidRecipient(address _recipient) internal view { require( _recipient != address(0) && _recipient != address(this), "DCHF: Cannot transfer tokens directly to the DCHF token contract or the zero address" ); require( !stabilityPoolManager.isStabilityPool(_recipient) && !validTroveManagers[_recipient] && !validBorrowerOps[_recipient], "DCHF: Cannot transfer tokens directly to the StabilityPool, TroveManager or BorrowerOps" ); } function _requireCallerIsBorrowerOperations() internal view { require(validBorrowerOps[msg.sender], "DCHFToken: Caller is not BorrowerOperations"); } function _requireCallerIsBOorTroveMorSP() internal view { require( validBorrowerOps[msg.sender] || validTroveManagers[msg.sender] || stabilityPoolManager.isStabilityPool(msg.sender), "DCHF: Caller is neither BorrowerOperations nor TroveManager nor StabilityPool" ); } function _requireCallerIsStabilityPool() internal view { require( stabilityPoolManager.isStabilityPool(msg.sender), "DCHF: Caller is not the StabilityPool" ); } function _requireCallerIsTroveMorSP() internal view { require( validTroveManagers[msg.sender] || stabilityPoolManager.isStabilityPool(msg.sender), "DCHF: Caller is neither TroveManager nor StabilityPool" ); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _setOwner(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _setOwner(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _setOwner(newOwner); } function _setOwner(address newOwner) private { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.14; contract CheckContract { function checkContract(address _account) internal view { require(_account != address(0), "Account cannot be zero address"); uint256 size; assembly { size := extcodesize(_account) } require(size > 0, "Account code size cannot be zero"); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.14; import "../Dependencies/ERC20Permit.sol"; import "../Interfaces/IStabilityPoolManager.sol"; abstract contract IDCHFToken is ERC20Permit { // --- Events --- event StabilityPoolAddressChanged(address _newStabilityPoolAddress); event DCHFTokenBalanceUpdated(address _user, uint256 _amount); function emergencyStopMinting(address _asset, bool status) external virtual; function addTroveManager(address _troveManager) external virtual; function removeTroveManager(address _troveManager) external virtual; function addBorrowerOps(address _borrowerOps) external virtual; function removeBorrowerOps(address _borrowerOps) external virtual; function mint( address _asset, address _account, uint256 _amount ) external virtual; function burn(address _account, uint256 _amount) external virtual; function sendToPool( address _sender, address poolAddress, uint256 _amount ) external virtual; function returnFromPool( address poolAddress, address user, uint256 _amount ) external virtual; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
pragma solidity ^0.8.14; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/utils/Counters.sol"; interface IERC2612Permit { /** * @dev Sets `amount` as the allowance of `spender` over `owner`'s tokens, * given `owner`'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current ERC2612 nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); } abstract contract ERC20Permit is ERC20, IERC2612Permit { using Counters for Counters.Counter; mapping(address => Counters.Counter) private _nonces; // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9; bytes32 public DOMAIN_SEPARATOR; constructor() { uint256 chainID; assembly { chainID := chainid() } DOMAIN_SEPARATOR = keccak256( abi.encode( keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ), keccak256(bytes(name())), keccak256(bytes("1")), // Version chainID, address(this) ) ); } /** * @dev See {IERC2612Permit-permit}. * */ function permit( address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external virtual override { require(block.timestamp <= deadline, "Permit: expired deadline"); bytes32 hashStruct = keccak256( abi.encode(PERMIT_TYPEHASH, owner, spender, amount, _nonces[owner].current(), deadline) ); bytes32 _hash = keccak256(abi.encodePacked(uint16(0x1901), DOMAIN_SEPARATOR, hashStruct)); address signer = ecrecover(_hash, v, r, s); require(signer != address(0) && signer == owner, "ERC20Permit: Invalid signature"); _nonces[owner].increment(); _approve(owner, spender, amount); } /** * @dev See {IERC2612Permit-nonces}. */ function nonces(address owner) public view override returns (uint256) { return _nonces[owner].current(); } function chainId() public view returns (uint256 chainID) { assembly { chainID := chainid() } } }
pragma solidity ^0.8.14; import "./IStabilityPool.sol"; interface IStabilityPoolManager { event StabilityPoolAdded(address asset, address stabilityPool); event StabilityPoolRemoved(address asset, address stabilityPool); function isStabilityPool(address stabilityPool) external view returns (bool); function addStabilityPool(address asset, address stabilityPool) external; function getAssetStabilityPool(address asset) external view returns (IStabilityPool); function unsafeGetAssetStabilityPool(address asset) external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); unchecked { _approve(sender, _msgSender(), currentAllowance - amount); } return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title Counters * @author Matt Condon (@shrugs) * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number * of elements in a mapping, issuing ERC721 ids, or counting request ids. * * Include with `using Counters for Counters.Counter;` */ library Counters { struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { unchecked { counter._value += 1; } } function decrement(Counter storage counter) internal { uint256 value = counter._value; require(value > 0, "Counter: decrement overflow"); unchecked { counter._value = value - 1; } } function reset(Counter storage counter) internal { counter._value = 0; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.14; import "./IDeposit.sol"; interface IStabilityPool is IDeposit { // --- Events --- event StabilityPoolAssetBalanceUpdated(uint256 _newBalance); event StabilityPoolDCHFBalanceUpdated(uint256 _newBalance); event BorrowerOperationsAddressChanged(address _newBorrowerOperationsAddress); event TroveManagerAddressChanged(address _newTroveManagerAddress); event DefaultPoolAddressChanged(address _newDefaultPoolAddress); event DCHFTokenAddressChanged(address _newDCHFTokenAddress); event SortedTrovesAddressChanged(address _newSortedTrovesAddress); event CommunityIssuanceAddressChanged(address _newCommunityIssuanceAddress); event P_Updated(uint256 _P); event S_Updated(uint256 _S, uint128 _epoch, uint128 _scale); event G_Updated(uint256 _G, uint128 _epoch, uint128 _scale); event EpochUpdated(uint128 _currentEpoch); event ScaleUpdated(uint128 _currentScale); event DepositSnapshotUpdated(address indexed _depositor, uint256 _P, uint256 _S, uint256 _G); event SystemSnapshotUpdated(uint256 _P, uint256 _G); event UserDepositChanged(address indexed _depositor, uint256 _newDeposit); event StakeChanged(uint256 _newSystemStake, address _depositor); event AssetGainWithdrawn(address indexed _depositor, uint256 _Asset, uint256 _DCHFLoss); event MONPaidToDepositor(address indexed _depositor, uint256 _MON); event AssetSent(address _to, uint256 _amount); // --- Functions --- function NAME() external view returns (string memory name); /* * Called only once on init, to set addresses of other Dfranc contracts * Callable only by owner, renounces ownership at the end */ function setAddresses( address _assetAddress, address _borrowerOperationsAddress, address _troveManagerAddress, address _troveManagerHelperAddress, address _dchfTokenAddress, address _sortedTrovesAddress, address _communityIssuanceAddress, address _dfrancParamsAddress ) external; /* * Initial checks: * - Frontend is registered or zero address * - Sender is not a registered frontend * - _amount is not zero * --- * - Triggers a MON issuance, based on time passed since the last issuance. The MON issuance is shared between *all* depositors and front ends * - Tags the deposit with the provided front end tag param, if it's a new deposit * - Sends depositor's accumulated gains (MON, ETH) to depositor * - Sends the tagged front end's accumulated MON gains to the tagged front end * - Increases deposit and tagged front end's stake, and takes new snapshots for each. */ function provideToSP(uint256 _amount) external; /* * Initial checks: * - _amount is zero or there are no under collateralized troves left in the system * - User has a non zero deposit * --- * - Triggers a MON issuance, based on time passed since the last issuance. The MON issuance is shared between *all* depositors and front ends * - Removes the deposit's front end tag if it is a full withdrawal * - Sends all depositor's accumulated gains (MON, ETH) to depositor * - Sends the tagged front end's accumulated MON gains to the tagged front end * - Decreases deposit and tagged front end's stake, and takes new snapshots for each. * * If _amount > userDeposit, the user withdraws all of their compounded deposit. */ function withdrawFromSP(uint256 _amount) external; /* * Initial checks: * - User has a non zero deposit * - User has an open trove * - User has some ETH gain * --- * - Triggers a MON issuance, based on time passed since the last issuance. The MON issuance is shared between *all* depositors and front ends * - Sends all depositor's MON gain to depositor * - Sends all tagged front end's MON gain to the tagged front end * - Transfers the depositor's entire ETH gain from the Stability Pool to the caller's trove * - Leaves their compounded deposit in the Stability Pool * - Updates snapshots for deposit and tagged front end stake */ function withdrawAssetGainToTrove(address _upperHint, address _lowerHint) external; /* * Initial checks: * - Caller is TroveManager * --- * Cancels out the specified debt against the DCHF contained in the Stability Pool (as far as possible) * and transfers the Trove's ETH collateral from ActivePool to StabilityPool. * Only called by liquidation functions in the TroveManager. */ function offset(uint256 _debt, uint256 _coll) external; /* * Returns the total amount of ETH held by the pool, accounted in an internal variable instead of `balance`, * to exclude edge cases like ETH received from a self-destruct. */ function getAssetBalance() external view returns (uint256); /* * Returns DCHF held in the pool. Changes when users deposit/withdraw, and when Trove debt is offset. */ function getTotalDCHFDeposits() external view returns (uint256); /* * Calculates the ETH gain earned by the deposit since its last snapshots were taken. */ function getDepositorAssetGain(address _depositor) external view returns (uint256); /* * Calculate the MON gain earned by a deposit since its last snapshots were taken. * If not tagged with a front end, the depositor gets a 100% cut of what their deposit earned. * Otherwise, their cut of the deposit's earnings is equal to the kickbackRate, set by the front end through * which they made their deposit. */ function getDepositorMONGain(address _depositor) external view returns (uint256); /* * Return the user's compounded deposit. */ function getCompoundedDCHFDeposit(address _depositor) external view returns (uint256); /* * Return the front end's compounded stake. * * The front end's compounded stake is equal to the sum of its depositors' compounded deposits. */ function getCompoundedTotalStake() external view returns (uint256); function getNameBytes() external view returns (bytes32); function getAssetType() external view returns (address); /* * Fallback function * Only callable by Active Pool, it just accounts for ETH received * receive() external payable; */ }
pragma solidity ^0.8.14; interface IDeposit { function receivedERC20(address _asset, uint256 _amount) external; }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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[{"inputs":[{"internalType":"address","name":"_stabilityPoolManagerAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_user","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"DCHFTokenBalanceUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_asset","type":"address"},{"indexed":false,"internalType":"bool","name":"state","type":"bool"}],"name":"EmergencyStopMintingCollateral","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_newStabilityPoolAddress","type":"address"}],"name":"StabilityPoolAddressChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address[]","name":"borrowerOps","type":"address[]"}],"name":"UpdateBorrowerOps","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address[]","name":"troveManagers","type":"address[]"}],"name":"UpdateTroveManagers","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_borrowerOps","type":"address"}],"name":"addBorrowerOps","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_troveManager","type":"address"}],"name":"addTroveManager","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"borrowerOps","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"chainId","outputs":[{"internalType":"uint256","name":"chainID","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_asset","type":"address"},{"internalType":"bool","name":"status","type":"bool"}],"name":"emergencyStopMinting","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"emergencyStopMintingCollateral","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_asset","type":"address"},{"internalType":"address","name":"_account","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_borrowerOps","type":"address"}],"name":"removeBorrowerOps","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_troveManager","type":"address"}],"name":"removeTroveManager","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_poolAddress","type":"address"},{"internalType":"address","name":"_receiver","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"returnFromPool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_sender","type":"address"},{"internalType":"address","name":"_poolAddress","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"sendToPool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stabilityPoolManager","outputs":[{"internalType":"contract IStabilityPoolManager","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"troveManagers","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"validBorrowerOps","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"validTroveManagers","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000202fbff035188f9f0525e144c8b3f8249a74ad21
-----Decoded View---------------
Arg [0] : _stabilityPoolManagerAddress (address): 0x202FbFF035188f9f0525E144C8B3F8249a74aD21
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000202fbff035188f9f0525e144c8b3f8249a74ad21
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